Finding the Fourth Proportional to 1,284.58, 1,925.42 and 635.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,284.58 : 1,925.42 = 635.78 : x
2. Step 2: Convert to fraction form
   1,284.58/1,925.42 = 635.78/x
3. Step 3: Cross multiply
   1,284.58x = 1,925.42 × 635.78
4. Step 4: Simplify right side
   1,284.58x = 1,224,143.53
5. Step 5: Solve for x
   x = 1,224,143.53/1,284.58
6. Step 6: Final answer
   x = 952.95